Cheesy Cauliflower Broccoli Gratin

Cheesy Cauliflower and Broccoli Gratin with a golden, bubbly cheese topping and tender vegetables inside. Save to Pinterest
Cheesy Cauliflower and Broccoli Gratin with a golden, bubbly cheese topping and tender vegetables inside. | cookingwithalana.com

This comforting gratin blends tender cauliflower and broccoli florets enveloped in a luscious cheese sauce, finished with a golden, crispy breadcrumb topping. Fresh florets are briefly boiled until just tender before being layered in a greased dish. A rich sauce of sharp cheddar, Gruyère, and warming spices envelops the vegetables for a creamy texture. The dish bakes to golden perfection, creating a satisfying balance of soft vegetables and crunchy finish. Ideal as a flavorful side or vegetarian main, it offers easy preparation and satisfying flavors with options for gluten-free adjustments.

Discovering this Cheesy Cauliflower and Broccoli Gratin was like uncovering a little secret in my kitchen—a warm, cozy dish that quickly became a go-to comfort food on chilly evenings.

One evening when unexpected guests arrived, I whipped this gratin together in no time and was so proud to serve something both impressive and comforting without the fuss.

Ingredients

  • Cauliflower and Broccoli: Choose fresh, firm heads to keep the florets tender yet holding their shape after cooking.
  • Cheddar and Gruyère cheese: Sharp and flavorful cheeses that melt beautifully to create that rich, creamy sauce you crave.
  • Butter and flour: The base of the sauce, best whisked carefully to avoid lumps and get that perfect smooth texture.
  • Parmesan and breadcrumbs: For the topping that transforms this dish with a golden crispy crust you won&t want to skip.

Instructions

Get Everything Ready:
Preheat your oven and grease your baking dish so nothing sticks and everything bakes evenly.
Cook the Veggies:
Boil the cauliflower and broccoli just until tender, catching that perfect balance so they won't get mushy under the cheese sauce.
Make the Cheese Sauce:
Melt butter and whisk in flour, then slowly add milk, stirring constantly till thick and creamy, finishing with sharp cheddar, Gruyère, mustard, and spices for depth.
Assemble the Gratin:
Layer the veggies in your dish, pour the glossy cheese sauce over them, then sprinkle the Parmesan-breadcrumb mix for that golden crisp finish.
Bake to Perfection:
Pop it into the oven until bubbling and topping golden, filling your kitchen with that irresistible aroma that makes waiting impossible.
Let It Rest:
Give it a few minutes after baking so it firms up just right before serving, making it easier to dish out and enjoy.
Creamy homemade Cheesy Cauliflower and Broccoli Gratin, perfect as a side dish, ready to be served. Save to Pinterest
Creamy homemade Cheesy Cauliflower and Broccoli Gratin, perfect as a side dish, ready to be served. | cookingwithalana.com

I remember this dish becoming a symbol of comfort during a tough winter—it wasn&t just food but a warm meal that gathered everyone around the table with smiles and seconds.

Keeping It Fresh

Always use fresh vegetables for the best texture and flavor. Storing the gratin leftovers in an airtight container keeps it tasting great for a couple of days, and a quick reheat in the oven restores the crispy topping.

Serving Ideas That Clicked

This gratin pairs beautifully with roast chicken or a green salad to balance the richness. For a vegetarian main, serve with crusty bread and a side of lightly dressed arugula for a full meal.

A Time This Recipe Saved the Day

Once, when the power flickered during a dinner party, I used a portable gas stove to quickly make the cheese sauce, and this dish still came out perfectly comforting and delicious.

  • Remember to let the dish rest before serving to set properly.
  • If you want a crispier topping, try broiling for the last few minutes but watch closely.
  • Don&t be afraid to experiment with cheeses to find your favorite mix.
A close-up view of the delicious Cheesy Cauliflower and Broccoli Gratin, fresh from the oven, bubbling hot. Save to Pinterest
A close-up view of the delicious Cheesy Cauliflower and Broccoli Gratin, fresh from the oven, bubbling hot. | cookingwithalana.com

Thanks for sharing this kitchen moment with me—I hope this gratin brings as much warmth and happiness to your table as it has to mine.

Recipe Questions & Answers

Briefly boiling the cauliflower and broccoli for 3-4 minutes until just tender helps maintain their texture before baking.

Yes, smoked Gouda or mozzarella can replace cheddar or Gruyère for different flavor profiles.

Mixing Parmesan cheese with fresh breadcrumbs and olive oil creates a golden, crunchy crust after baking. Broiling for 2-3 minutes enhances crispiness.

Use gluten-free flour in the sauce and substitute regular breadcrumbs with gluten-free breadcrumbs.

Yes, paired with a fresh salad, it makes a satisfying vegetarian main dish thanks to its creamy texture and filling ingredients.

Cheesy Cauliflower Broccoli Gratin

Tender cauliflower and broccoli baked in a creamy cheese sauce with a crispy golden topping.

Prep 20m
Cook 35m
Total 55m
Servings 6
Difficulty Easy

Ingredients

Vegetables

  • 1 medium head cauliflower, cut into florets (approximately 21 ounces)
  • 1 medium head broccoli, cut into florets (approximately 14 ounces)

Cheese Sauce

  • 2 tablespoons unsalted butter
  • 2 tablespoons all-purpose flour (substitute gluten-free flour for gluten-free option)
  • 1 ½ cups whole milk
  • 1 cup grated sharp cheddar cheese
  • ½ cup grated Gruyère or Swiss cheese
  • ½ teaspoon Dijon mustard
  • ¼ teaspoon freshly grated nutmeg
  • Salt and black pepper, to taste

Topping

  • ½ cup grated Parmesan cheese
  • ½ cup fresh breadcrumbs (use gluten-free breadcrumbs for gluten-free option)
  • 1 tablespoon olive oil

Instructions

1
Preheat Oven and Prepare Dish: Preheat the oven to 400°F. Lightly grease a 2-quart baking dish.
2
Blanch Vegetables: Bring a large pot of salted water to a boil. Add cauliflower and broccoli florets and cook for 3 to 4 minutes until just tender. Drain thoroughly and set aside.
3
Prepare Cheese Sauce: In a medium saucepan over medium heat, melt butter. Whisk in flour and cook, stirring continuously, for one minute.
4
Incorporate Milk: Gradually whisk in the milk until the mixture is smooth and slightly thickened, approximately 3 to 4 minutes.
5
Add Cheese and Seasonings: Remove from heat. Stir in cheddar, Gruyère, Dijon mustard, nutmeg, salt, and pepper until cheeses have melted and sauce is smooth.
6
Assemble Gratin: Place the drained cauliflower and broccoli evenly in the prepared baking dish. Pour the cheese sauce evenly over the vegetables.
7
Prepare and Add Topping: In a small bowl, mix Parmesan cheese, breadcrumbs, and olive oil. Sprinkle this mixture evenly over the gratin.
8
Bake: Bake for 25 to 30 minutes until the topping is golden brown and the gratin is bubbling.
9
Rest Before Serving: Allow the gratin to rest for five minutes before serving.
Additional Information

Equipment Needed

  • Large pot
  • Saucepan
  • Whisk
  • 2-quart baking dish
  • Mixing bowls
  • Colander

Nutrition (Per Serving)

Calories 265
Protein 13g
Carbs 16g
Fat 16g

Allergy Information

  • Contains milk, wheat (gluten), and cheese (dairy). Gluten-free adaptations available using gluten-free flour and breadcrumbs.
Alana Brooks